When it comes to becoming a wonderful jazz improviser, it's all about learning jazz language. So unlike the 'half-step listed below approach' (which can be outside the scale), when approaching from above it sounds much better when you keep your notes within the scale that you're in. That's why it's called the 'chord scale over' strategy - it stays in the scale.

So rather than playing two eight notes in a row, which would certainly last one quarter note ('one' - 'and'), you can split that quarter note right into three 'eighth note triplet' notes - where each note of the triplet coincides size. The very first improvisation technique is 'chord tone soloing', which suggests to compose tunes making use of the 4 chord tones of the chord (1 3 5 7).

For this to work, it needs to be the next note up within the range that the music is in. This offers you 5 notes to play from over each chord (1 3 5 7 9) - which is plenty. This can be put on any note length (half note, quarter note, eighth note) - however when soloing, it's normally related to eighth notes.

It's great for these units to come out of scale, as long as they wind up solving to the 'target note' - which will typically be just one of the chord tones. The 'chord range over' strategy - precede any type of chord tone (1 3 5 7) with the note above. In songs, a 'triplet' is when you play 3 evenly spaced notes in the room of 2.

Currently you could play this 5 note range (the incorrect notes) over the exact same C minor 7 chord in your left hand. With this technique you just play the exact same notes that you're currently playing in the chord. Chord range over - half-step below - target note (e.g. E - C# - D).

Many jazz piano techniques piano solos feature a section where the tune stops, and the pianist plays a collection of chord voicings, to a fascinating rhythm. These include chord tone soloing, method patterns, triplet rhythms, 'chordal textures', 'playing out' and a lot more.